Metal Foam - Fuel Cell Cold Start Performance Enhancement

Commerceizedfuro dzesimbiParizvino inzira yakanaka inogona kuita kune yakajairwa vamhanyi vemafuta emafuta nekuda kweiyo porous microstructure, yakakwirira porosity, uye yakanaka mechanic simba.
Kutanga, iyo polarization performance yebhatiri pasi pemamiriro ekushanda akajairika pakudziya kwekamuri yakaongororwa. Tichifunga kuti iyo cathode ndiyo huru electrode inorambidza kushanda kwebhatiri, yakajairwa parallel kuyerera nzira dzinoshandiswa kune anode yeese maseru, uye yakajairika parallel kuyerera nzira dzinoshandiswa kune cathode ine itsva nickel-simbi furo kuyerera munda, zvichiteerana.
Kunyatso kuratidza kusiyana kwekuyerera uye kusiyana kwekuita muminda miviri yekuyerera, chidzidzo chakashandisa slender cell flow field ine saizi ye 1.5 cm × 20 cm (magasi ese aiyerera achitevedza rutivi rurefu), iyo yakarasikirwa nesero rekutanga. kushanda, uye naizvozvo, kushandiswa kwesero polarization kwakanga kusina kukwirira. Mukuwedzera, iyo MEA imwechete (Nafion-112) yakashandiswa kune ese masero muyedzo. Nekuda kwekukwirira kwepamusoro kweiyo diki yekuyerera chiteshi mumhepo inoyerera simbi inoyerera, kudonha kwekumanikidza kumativi ese ari maviri kwakakwira zvichienzaniswa neyakapfava yakareba yakatwasuka chiteshi munharaunda yekuyerera, iyo inowedzera gasi kugovera kune cathode, iyo inoshanda. kudzvanywa, uye chiyero che electrochemical reaction, uye panguva imwe chete, inoda kushandisa yakanyanya kudzvanywa gasi injini simba kune imwe nhanho uye inowedzera kurasikirwa kwekupomba. Iyo yakanyanya simba density yakakwira kune maseru anefuro resimbiminda inoyerera, nepo iri pasi pemhepo, simba remagetsi rakadzikira zvishoma pane iro remaseru akajairika ekuyerera. Pakazara, zvakanakira kushandisa simbi foam flow field zvichiri zvakakosha. Nokufamba kwenguva, nekuda kwekuwanda kwegasi uye mvura yemvura inoyerera mumhepo inoyerera yesimbi inoyerera, ipfupi inoyerera munda inogona kushandiswa mukuita maapplication, kana kushandiswa kwecathode uye anode vertical cross-supply (anode gasi inoyerera ichitevedza Rutivi rurefu rwechinyakare chinoyerera chiteshi, cathode gasi inoyerera ichitevedza parutivi rupfupi rwemhepo inoyerera furo), iyo inowedzera kudzikisa kurasikirwa kwekupomba kunokonzerwa necathode inlet uye kubuda kwekumanikidza kudonha, uye nekudaro zvinotarisirwa ziva kukwidziridzwa kwekuita kwebhatiri, uye chengetedza simba rakafanana kana rakatokwira kupfuura chiteshi chekare chekuyerera, chinogona kuwanikwa nekufamba kwenguva. Naizvozvo, zvinotarisirwa kuona kukwidziridzwa kwekuita kwesero uku uchichengetedza kurasikirwa kwekupomba kwakafanana kana kuderera kupfuura iyo yechinyakare yekuyerera chiteshi.
Kune rimwe divi, kugadzirisa kushushikana kwe sub-zero mamiriro ekutanga, isu tinonyatso enzanisa simba rekutanga kuita kwemaseru emafuta ane furo simbi inoyerera ndima uye yakajairwa parallel kuyerera chiteshi pa cathode pasi pezvinogara zviripo uye zvinogara zvichiitwa voltage modes, zvichiteerana.
Kune rimwe divi, kune yakakurumbira sub-zero yekutanga mamiriro, isu tinonyatso enzanisa ine simba rekutanga kuita kwemaseru emafuta ane furo simbi inoyerera ndima uye yakajairwa parallel kuyerera chiteshi pa cathode pasi pezvinogara zviripo uye zvinogara zvichiitwa voltage modes, zvichiteerana.
Iyo foam-metal inoyerera munda inoratidza zvakanakira mabhenefiti, ine yakagadzikana sero kuita panguva yekutanga uye nekubudirira kwekutanga, nepo zvinopesana, yakajairwa-inoyerera-inoyerera chiteshi sero, ine yakaderera uye isina kugadzikana sero kubuda magetsi panguva yekushanda, inovandudza kupisa kwekushisa uye tembiricha. chiyero chekukwira kune imwe nhanho, asi nekuda kwemashoma ekuyerera nzira, mukana weicing uye kuvhara kunowedzera mutsara (zvichienderana nenhamba yekuyerera chiteshi), izvo zvinotungamira kukuchinja kwayo kwesero kubuda kwekuita. mukana wekuvharwa kwechando unowedzera zvakatevedzana (zvichienderana nehuwandu hwematanho ekuyerera), zvichikonzera kuchinja kwesero kubuda kwekuita uye kuwedzera mukana wekutadza kwekutanga.
Muchidimbu, yakanakisa porous chimiro chemafuta sero nefuro simbinzvimbo yekuyerera ine zvakakosha pamusoro pesero ine yechinyakare "mugero-ridge" inoyerera chiteshi pasi pese maviri ekamuri tembiricha kushanda uye sub-zero ine simba yekutanga mamiriro.
Iyo yakanyanya simba density uye yekupedzisira yazvino density yebhatiri pane tembiricha yekamuri inowedzerwa neinenge 25%;
Pasi pe-sub-zero mamiriro ekutanga, kushanda kwemabhatiri ane foam metal flow field kunopfava panguva yekutanga, uye yakaderera-yekushisa yekuzvitanga kugona inovandudzwa zvakanyanya.
Pamusoro pezvo, kushandiswa kweakawanda akakwenenzverwa marapirwo efoam metal zvinhu, senge goridhe plating kusimudzira conductivity, kwakakodzera hydrophobicity uye corrosion resistance treatments, uye kushandiswa kwefuro zvinhuine mamwe akakwenenzverwa pore saizi, porosity, uye compression ratios, inotarisirwa kuwedzera kusimbisa kushanda kwesero remafuta uye kuwedzera kusimba kwekutonhora-kutanga kutenderera.